Long-Term Outcomes of Primary Trabeculectomy in Diabetic Patients without Retinopathy with Primary Angle-Closure Glaucoma.

. To evaluate primary trabeculectomy with adjunctive mitomycin-C (MMC) in diabetic patients without retinopathy with primary angle-closure glaucoma (PACG). . This is a retrospective case series comparison. . This retrospective trial compared outcomes of 88 eyes that underwent trabeculectomy in patients with diabetes mellitus (DM) without retinopathy and in 97 patients without DM. . In this study, the intraocular pressure (IOP), visual acuity, visual field, and postoperative complications were compared between the two groups. Qualified surgical success is defined as an IOP between 6 and 18 mmHg with or without topical antiglaucoma medication. . After a follow-up of 5 years, the IOP decreased from a mean basal IOP of 27.8 ± 7.3 mmHg to 15.0 ± 5.6 mmHg in the DM group and from 27.3 ± 6.0 mmHg to 12.4 ± 5.3 mmHg in the control group. The mean number of antiglaucoma medications was 3.4 ± 1.3 and 3.3 ± 1.2 preoperatively ( = 0.587) whereas it was 1.7 ± 1.5 and 1.1 ± 1.4 at the 5-year follow-up ( = 0.049). The 5-year qualified surgical success rates were 42.9% and 65.4% for both groups ( = 0.046; log-rank test). Encysted blebs were seen in 21 (23.9%) patients in the DM group and in 12 (12.4%) patients in the control group ( = 0.041). . PACG patients with DM without retinopathy undergoing primary trabeculectomy with MMC may have a lower long-term surgical survival rate compared with patients without DM.